相关实验视频
Updated: Jul 19, 2026

08:43
Transformation of Organic Household Leftovers into a Peat Substitute
Published on: July 9, 2019
通过生物碳封存来交易碳的水
Robert B Jackson1, Esteban G Jobbágy, Roni Avissar
1Department of Biology, Nicholas School of the Environment and Earth Sciences, and Center on Global Change, Duke University, Durham, NC 27708-1000, USA. jackson@duke.edu
概括
用于碳捕获的树木种植会对环境造成重大破坏. 森林植被导致主要的河流流量减少,土壤盐化和酸化,影响全球的水资源和生态系统.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 土壤科学 土壤科学
背景情况:
- 树木种植被促进用于碳捕获.
- 它们对环境的全部影响,特别是对水资源和土壤的影响,往往被忽视.
研究的目的:
- 研究种植树木对环境的影响,重点关注河流流动,土壤盐化和酸化.
- 评估植树造林对气候变化减缓的全球和区域影响.
主要方法:
- 结合了实地研究,合成了600多个观测结果.
- 利用气候和经济建模进行场景分析,包括美国种植场景.
主要成果:
- 全球森林植被使溪流流量每年减少227毫米 (52%).
- 13%的河流至少在一年内完全干.
- 观察到与种植相关的土壤盐化和酸化增加.
结论:
- 树木种植对河流流量和土壤健康有重大负面影响.
- 气候反不太可能减轻这些水损失,可能会使它们恶化.
- 虽然种植园可以影响地下水,但它们对水资源和土壤的净影响是有害的.
相关概念视频
What are Biogeochemical Cycles?
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
The Water Cycle
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
The Carbon Cycle
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
Bioremediation
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
Carbon-dioxide Fixation
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
Microbes and the Carbon Cycle
The carbon cycle is a fundamental Earth process involving the transfer of carbon among the biosphere, lithosphere, atmosphere, and hydrosphere. It plays a critical role in regulating the planet’s climate and supporting life by cycling carbon through various chemical forms and reservoirs. Carbon primarily circulates as carbon dioxide (CO₂), representing its oxidized form, while reduced forms such as methane (CH₄) and organic compounds also play essential roles.Microbial activity is central to...

